Facebook has begun removing pages related to pro-pedophilia advocacy group NAMBLA (North American Man/Boy Love Association) after a Fox News investigation revealed the group was using the popular social networking site to share photos of children, target victims, and connect fellow members.

According to Fox News, the "simple, five-second search on Facebook, conducted on Sept. 23, yielded dozens of pages" devoted to NAMBLA, including photos of unnamed boys who appeared to be in kindergarten or younger. Members of NAMBLA try to promote the legalization of sex between adult males and underage boys.

Hemanshu Nigam, co-chairman of President Obama's Online Safety Technology Working Group and a member of the board of the National Center for Missing and Exploited Children said, "This is just the downright filthiest of society setting up on Facebook in a public way, and the question is, 'Why is Facebook allowing this?'."

CBS News reports that Facebook objected to the original report, claiming the extent of the problem was "more modest than suggested" and most of the 87 groups found had no more than 15 or 25 members. A representative for the social networking site says they immediately disabled the links to the groups as well as the accounts of the people who created them.

"This is something we need to be prepared for - content put up again and again after we have taken it down," the Facebook spokesman said. "It's a constant effort."